Hundreds of large tanks were quickly buried under the city walls on the west and north of the inner city, and two thousand soldiers crawled on the tank and listened to the movements underground.

Li Yanqing finally thought about the reason why the Jin soldiers drained the moat water. It must be that the Jin soldiers were preparing to enter the city from the tunnel. Due to the influence of the terrain, the water in the moat in the east and south was difficult to drain, and the groundwater was rich. Li Yanqing was basically sure that the Jin soldiers would enter the city from the north or west. Since the ground buildings on the north were demolished, it was easy to be discovered by the defenders. So far, no trace of the tunnel was seen outside the North City, and Li Yanqing also ruled out the North City.

Most of the buildings in the West Outer City are well preserved, which provides excellent cover for the Jin soldiers to attack tunnels. Moreover, the nearest building is only a hundred steps away from the city wall. The Jin soldiers only need to dig more than one hundred steps to enter the city.

Li Yanqing focused on the northwest corner, where the terrain is the highest, the soil is the strongest, and it is the least likely to collapse when digging holes here.

While the Song army was fully protecting, the epidemic in the Jin army camp further worsened. By night, Beizhai, where the epidemic was the most severe, more than 10,000 soldiers fell ill and nearly 3,000 died. More than 2,000 people died today alone, which was the day with the largest death toll since the outbreak. This was just the situation of a military camp.

Several other military camps also had hundreds to thousands of people ill, with a total number of patients reaching 15,000 and more than 4,000 deaths. The smallest of them was Zhongjun camp, with only more than 400 people ill and no deaths. This is also the experience of the Han military doctors in Zhongjun camp. They were the first to ask the Jurchens to change their habit of drinking raw water, so that the disease did not break out on a large scale in Zhongjun camp.

After withdrawing, Wanyan Xie ordered the 50,000 troops of the Zhongjunzhai to go north first, and the other troops were waiting for the final step of siege before considering the camp to detach the camp and return north.

Under the night, Wanyan Xie also stood on the platform and looked at Tokyo City from afar. The moonlight was dim and only the outline of a city could be faintly seen. Wanyan Xie also had a serious face and remained silent for a long time.

At this time, Wanyan Loushi whispered ashamed: "I am incompetent and have let down Marshal Du's expectations."

Wanyan Xie also shook his head and said slowly: "Do you know why the Jurchen cavalry could defeat the 200,000 Song army with 30,000 elite troops. He only lost hundreds of people, but attacking the capital was just the opposite. Our 200,000 army could not break the city walls garrisoned by the 30,000 defenders. What is the reason? Have you considered it?"

Wanyan Loushi thought for a while and whispered: "Maybe it's because siege is not our strength."

"Then why can Taiyuan City be captured? Why can Tokyo Outer City be captured again?"

"Is it because of Li Yanqing?"

"Actually, you said that it is related to our lack of siege, and it is also related to Li Yanqing's ability, but these are not the main reasons. The main reason is the character of the Han people. They often burst out unimaginable forces in desperate situations, born from distress and died from peace. This is the reason for the same army, when they are in desperate situations, they will be commanded by a famous general, and they will not retreat again, but will fight back and die before they die. This is the reason for our failure."

"But we captured the emperor and the emperor of the Song people, which is actually not too failure."

Wanyan Xie also smiled bitterly and shook his head, "The most important thing the Han people lack is the emperor."

After saying that, Wanyan Xie also turned around and walked down the wardrobe. His order came from afar, "Let Xizhai retreat north too!"

Wanyan Loushi suddenly felt that Marshal was not optimistic about the last blow tonight.

The reason why the Jin soldiers decided to use the method of digging tunnels to enter the city was by chance. When a team of Jin soldiers were searching for property, they accidentally discovered a secret road in a mansion near the northwest corner of the inner city. The secret roadmaster was about fifty steps, only a dozen steps away from the moat.

After Wanyan Xie also received the news, he decided that the soldiers would continue to dig out and dig out an authentic tunnel to the inner city, so that the Jin soldiers could enter the inner city from the tunnel.

But the moat above the head was a huge threat. After Wanyan Xie also inspected the terrain, he sent Wanyan Zongwang to lead 100,000 civilians to cut off the Bian River. The moat lost the replenishment of the river. The water of the moat on the west and north, which was higher, disappeared. From dusk, five hundred Jin soldiers, led by a commander of a thousand men, began to dig into the tunnel in large quantities. The progress was very rapid. In just half an hour, the tunnel passed the moat on the head and began to march towards the city wall.

In the city, two thousand soldiers were focusing on putting their ears on the large cylinder and listening carefully. The large cylinder is a good sound amplifier, making full use of the earpiece principle and can amplify subtle sounds.

At this time, a soldier suddenly jumped up and waved to Zhang Qing, the chief general on duty in the distance. Zhang Qing quickly walked forward and said, "Did you hear the movement?"

The soldiers nodded, "I heard the excavation sound!"

Several soldiers next to him also stepped forward and lie on the tank and listened carefully. They all raised their heads and said, "There is indeed movement!"

Zhang Qing also leaned down, listened for a moment, stood up and said to a soldier, "Go and report to the governor quickly, and he said he had discovered the sound of the enemy's excavation!"

The soldiers rushed away, and Zhang Qing ordered the soldiers to move away a few large cylinders around them, leaving only one master cylinder. Soon, hundreds of soldiers surrounded Li Yanqing and rushed over.

"Have you found the authenticity?" Li Yanqing asked.

Zhang Qing pointed to the big cylinder, "It's just under this big cylinder, about two feet away from us."

Li Yanqing immediately ordered: "Dig out the tunnel and prepare for poison attack!"

Hundreds of people dig holes together, and some soldiers brought hundreds of poisonous fireworks and thunders. The poisonous fireworks and thunders were a firearm invented by the Song army in the early days. The gunpowder was filled with a paper bag, mixed with highly toxic powder. After the gunpowder bag was ignited, it would emit a large amount of poisonous smoke. It was a powerful tool to deal with the tunnel.

Soon, a big pit that was ten feet deep and nine feet square appeared in front of everyone. At this time, everyone heard the obvious sound of "bang! bang!", which was only a few feet away from the big pit.

Suddenly there was movement in the big pit. The soil on the pit wall loosened, revealing a two-foot-wide hole. Then a man's head poked out from the hole. Before he could react, a sharp arrow shot out and shot the head of the Jin soldiers through. The Jin soldiers died immediately. Several soldiers jumped out of the pit and dragged the body out of the hole. More than a dozen poisonous fireworks thunders were lit in a row and threw it into the hole. A violent cough sound came from the hole. Then someone in the hole shouted in fear, and poisonous smoke filled the hole, and soon there was no movement.

Soon, a soldier on the top of the city shouted: "Smoke is coming from the house in the outer city."

Li Yanqing immediately ordered, "Fill water!"

The soldiers had already prepared two thousand buckets of water and poured into the pit together. The water flowed into the hole and soon overflowed from the outer city. At this time, a loud bang from the moat, a thunderclap exploded in the moat, blew up a large pit in the moat. The tunnel below collapsed, and more than a hundred Jin soldiers were buried in the tunnel.

......

A quarter of an hour later, Wanyan Xie also received a quick report from the Jin soldiers. The tunnel attack failed. He couldn't help but sigh, "Send the order to all the troops to detach the camp and return north!"

In May of the first year of Jingkang, the Tokyo Defense War, which lasted for nearly half a year, finally ended with the retreat of the Jin soldiers. In this battle, nearly 100,000 Jin soldiers suffered casualties, and the Song army also paid the price of nearly 200,000 casualties. At the same time, the Song Dynasty emperor Zhao Huan and the Supreme Emperor Zhao Ji were captured and taken away by the Jin soldiers. However, in the fierce battle to defend the capital, the Song army finally defended the inner city and preserved the last dignity of the Song Dynasty.

The sky gradually became brighter, and several dull explosions came from a distance. The temporarily built Bian River dam was blown up by the Song army. The water of the Bian River surging and soon filled the moat. The water level of the Bian River in the city began to rise rapidly and soon returned to its original state.

Soon, with the news of the spies' retreat from the north, cheers suddenly appeared on the city, and the whole capital was boiling. Hundreds of thousands of people rushed out of their homes, beating drums and drums, singing and dancing to celebrate the victory of defending the city.

But Li Yanqing knew very well that this was just a military victory, and the devil of plague lurked outside the city. He ordered that the city gate be not allowed to be opened, and two thousand soldiers were sent to cover their mouths and noses with gauze, and went out of the city with gloves and long boots to clean up the battlefield. He threw all the bodies into the pit and poured tinder oil to burn them.

Li Yanqing immediately issued several orders in a row, "The whole city of military and civilians drink raw water and eat raw food. The water must boil and the food must be cooked; "No urination or defecation is allowed anywhere;" "Anyone who has symptoms of vomiting and diarrhea must report to the hospital."

In fact, starting from yesterday evening, Li Yanqing ordered extremely strict epidemic monitoring in the city. Every five households elected one person as the monitor. The situation must be reported five times a day. Every hundred households have a chief monitor and every five hundred households have a medical officer. At the same time, the Imperial City Military Camp was transformed into an isolation camp, and the Beicheng Military Camp was set up as an observation camp. All soldiers outside must enter the observation camp to live for three days.

Not only that, the Song army also laid a layer of quicklime in the Jinglong City urn and built a potion pool. All soldiers who returned from outside the city soaked in the potion pool first, then changed into new clothes, shoes and socks, threw old clothes into the pit and burned them, and then went to the military camp to observe for three days.

Li Yanqing sent out a total of 4,000 troops, each of them had their own tasks. In addition to cleaning the battlefield, Zhang Hu led 500 cavalry to Guancheng County, Zhengzhou to welcome King Kang Zhao Gou, while Zhang Qing led 1,500 people to carry tincture oil to Jin Camp for destruction, mainly to completely burn the Jin Camp.

Li Yanqing came to Cai’s mansion and visited Cai Jing, the old prime minister who lived deep in the mansion. Cai Jing did not leave the capital after Zhao Huan ascended the throne, but was ordered by Zhao Heng to think about his mistakes at home, which also allowed him to escape the disaster of dying on the way south in history.

Cai Jing's prime minister's mansion was originally in the outer city, and there was also a different house covering an area of ​​ten acres in the inner city. After Zhao Huan ascended the throne, he moved back to the inner city to live and donated the house to the court. Although Cai Jing reported that Wang Fu was spared, his sons had no good luck.

The eldest son Cai You was killed by the rebel army with the Emperor, the second son died young, the fifth son was bitten to death by a snake, the third son and the fourth son were dismissed from office and exiled to Baizhou for being involved in the case of Wang Fu, the sixth son stayed in his hometown in poor health, and the youngest son took a group of grandsons back to his hometown for refuge. At present, only his grandson Cai Zheng followed and took care of his daily life.

Li Yanqing came to Cai’s Mansion. Cai Zheng had already been waiting at the door. He hurriedly stepped forward and bowed, "Welcome to Li Shaobao. The mansion will be full of glory and glory, and it is a great honor!"

Cai Zheng was about thirty years old and was the fourth grandson of Cai Jing. He served as the attendant of Fuwenge. After Zhao Huan ascended the throne, he was dismissed from office. However, he was deeply influenced by his grandfather's calligraphy essence, his calligraphy was excellent, his knowledge was good, and his temperament was gentle and elegant.

Li Yanqing smiled and said, "Yanei is so polite, Ling Zuke is there?"

"My ancestor is in the mansion, please follow me."

Li Yanqing followed him into the mansion. Li Yanqing had been to Cai Xiangguo Mansion in the outer city. The mansion was magnificent and extremely luxurious. However, the other houses in the inner city were a different situation. The layout was very simple and the utensils were a bit crude. It looked like a small family with tight life. It really made Li Yanqing secretly admire him. Cai Jing was indeed good at disguising. No wonder he had been able to rise and fall over the decades, and he was indeed extraordinary.

When Li Yanqing came to the inner house, he saw an old man growing vegetables in the garden. He wore a half-old flat towel, a gray short coat of coarse cloth, a coarse cloth bloomers, a white cloth leggings, a pair of old cloth shoes, a hunched back, and a water scoop in his hand, watering the vegetable field, no difference from the old farmer in the countryside. Cai Zheng stepped forward and gave a deep gift, "Grandfather, Li Shaobao is here!"

Li Yanqing couldn't help but be stunned. This old farmer who grows vegetables was actually Cai Jing?
Chapter completed!